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Characteristics of laser-induced plasma from highT c superconductor
Author(s) -
G. Padmaja,
Ashok V. Kumar,
V. Vidyalal,
P. Radhakrishnan,
V. P. N. Nampoori,
C. P. G. Vallabhan
Publication year - 1991
Publication title -
bulletin of materials science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.35
H-Index - 72
eISSN - 0973-7669
pISSN - 0250-4707
DOI - 10.1007/bf02744683
Subject(s) - plasma , materials science , laser , ion , atomic physics , ionic bonding , oxide , superconductivity , spectral line , analytical chemistry (journal) , optics , nuclear physics , condensed matter physics , physics , metallurgy , chemistry , quantum mechanics , astronomy , chromatography
The spectroscopic analysis of the emission from the plasma produced by irradiating a highT c superconducting GdBa2Cu3O7 target with a high power Nd:YAG laser beam shows the existence of the bands from different oxides in addition to the lines from neutrals and ions of the constituent elements. The spectral emissions by oxide species in laser-induced plasma show considerable time delays as compared to those from neutral and ionic species. Recombination processes taking place during the cooling of the hot plasma, rather than the plasma expansion velocities, have been found to be responsible for the observed time delays in this case. The decays of emission intensities from various species are found to be non-exponential.

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